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Unformatted text preview: 2007-10-25Read chapter 5, pages 158-203Sensation and Perception: Using Vision to Explore the Mystery of Sensation and PerceptionThe Functioning of the SensesUnderstanding the steps that link the stimulus to our conscious experienceSensory coding: what are the realms of the sensory system?oClassic 5: vision, hearing, touch, taste, smelloAlso:KinesthesisVestibular sensesSkin senses: pressure, cold, warmth, painFeatures in Common:oAll perform transductionTranslating physical stimuli (e.g. sound waves) into an action potential in a neuronoCoding Aspects:Psychological intensitySensory qualityoImportant to our experience: the pattern of neural firings that result from the stimulation of those neuronsVision: The Basic Sensory ProcessesOf all senses, vision represented by the largest area of the cortexAspects of vision:oStructures of vision and how they workoNature of transduction processoNature of coding processStimulus to the structures: LightLight measured in waves (like sound)Amplitude of wave: brightnesssFrequency: expressed by the length of the waveUsually expressed in wavelength (sound usually expressed in frequency)The Visible light SpectrumPerceive a small part of electromagnetic (EM) spectrumoLight waves measured in nanometers (billionths of a meter)From 700nm to 400nmBees can see things past gamma rays and rattlesnakes can see things past AC circuitsWavelengths we can see comprise the visible spectrum: 400 700 nanometreso400nm=blueo700nm=red...
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- Spring '09